Enlightenment

One dictionary definition of "enlightenment" is a a "blessed state in which the individual transcends desire and suffering and attains complete self realization."

Like most spiritual concepts the experience transcends definition.

Depending on your religion, beliefs or experience, the same concept or attainment may be familiar to you with different words.

Here are some other attempts at explaning enlightenment:

Oneness

Unity

Merging

Nirvana

Deliverance

The Alchemical Transformation

Original Perfection

True Nature

Union

The Eye of Wisdom

The Light

The Goal of the Spiritual Quest

Knowing Beyond Knowledge

The Peace that Passes All Understanding

Self Liberating Super-Conscious Insight

The Secret Mystery of Life

The Valuable Essence of All Experience

The Living Truth, Unalloyed and Self Evident

The Engame of All Creation

Free Awareness

The Absolutely Non-Dependent State

Enlightenment is not a religion.  It is a goal, recogized or not, of many religions.

Enlightment is not a belief.

Enlightenment is not a faith.

Enlightenment does not require a group to happen.

Enlightenment happens within.

Enlightenment is a deeply personal and unique experience for each individual.